# Sierra Pacific Power Company — Pipeline Safety Interpretation

- **operation:** document
- **citation:** PI-98-008
- **title:** Sierra Pacific Power Company — Pipeline Safety Interpretation
- **source type:** guidance
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** guidance
- **official:** true
- **published on:** 1998-11-10
- **effective on:** Not available
- **summary:** PI-98-008 response to Sierra Pacific Power Company concerning 192.195.
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- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1998/PI98008.pdf
**body:**

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11/10/98
Mr. Michael G. Rodriguez
Supervisor, Gas System Control
Sierra Pacific Power Company
PO Box 10100
Reno, NV 89520-0024
Dear Mr. Rodriguez:
I am responding to your letter of September 28, 1998, to Tom Lael concerning the requirements
of 49 CFR 192.195 for overpressure protection at city gate stations. Specifically, you asked if an
LDC that receives gas at four regulating stations operated by a transmission company is required
to provide overpressure protection at each station in addition to the station’ s working and
monitor regulators. Each station reduces the pressure of gas delivered to the LDC from 540 psig
to 90 psig, the maximum allowable operating pressure (MAOP) of the distribution system.
Each distribution system to which §192.195 applies that is connected to a gas source that has
higher pressure than the MAOP of the system must have certain overpressure protection devices.
If an LDC seeks to satisfy this requirement by relying on overpressure protection devices
operated by its gas supplier, the LDC is still responsible for compliance with §192.195. In your
situation, if the devices at each of the transmission company’ s regulating stations comply with
§192.195 requirements, then no other protective devices are necessary.
If we can be of further assistance, please call me at (202)366-4565.
Sincerely,
Richard D. Huriaux, P.E.
Regulations Manager
Office of Pipeline Safety
LMFurrow:jmd:64046:10-21-98
cc: DPS-1,20,Regions,TSI,StateMailing
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